Schedule IV - Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Premium Earned:
Gross amount	$ 803,034	$ 748,203
Ceded to other companies	(329,690)	(316,089)
Assumed from other companies	8,454	4,763
Net premiums earned	$ 481,798	$ 436,877
Percentage of amount assumed to net	1.75%	1.00%
Life Insurance Product Line [Member]
Premium Earned:
Gross amount	$ 0	$ 0
Ceded to other companies	0	0
Assumed from other companies	0	0
Net premiums earned	0	0
Accident and Health Insurance Product Line [Member]
Premium Earned:
Gross amount	0	0
Ceded to other companies	0	0
Assumed from other companies	0	0
Net premiums earned	0	0
Property, Liability and Casualty Insurance Segment [Member]
Premium Earned:
Gross amount	803,034	748,203
Ceded to other companies	(329,690)	(316,089)
Assumed from other companies	8,454	4,763
Net premiums earned	$ 481,798	$ 436,877
Percentage of amount assumed to net	1.75%	1.00%
Title Insurance Product Line [Member]
Premium Earned:
Gross amount	$ 0	$ 0
Ceded to other companies	0	0
Assumed from other companies	0	0
Net premiums earned	$ 0	$ 0